Durastab Medtech Co., Ltd. has always adhered to the mission of "making diagnostic reagents more stable and more accurate" since its establishment, and is committed to providing excellent ready-to-use reagent solutions to global advanced medical diagnostic companies.
To date, Durastab has successfully provided products to over 600 companies and research teams at thousands of universities and scientific research institutions worldwide, among which are more than 50 listed IVD companies.
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Protein protectant 21 is a small-molecule hormone stabilizer designed to be added to user-prepared dilutions of hormone antigen standards, calibrators, or controls. This product is specifically developed to protect small-molecule hormone antigens, enhancing the storage stability and thermal stability of the kit, thereby extending the shelf.
Art no: PS21
Package size: 100mL, 1L, bulk
Appearance: transparency liquid
Usage amount: 0.5%~5%（V/V）
Storage: 2-8℃
Shelf life: 3 years
Protein protectant 21
Protein protectant 21 is a small-molecule hormone stabilizer designed to be added to user-prepared dilutions of hormone antigen standards, calibrators, or controls. This product is specifically developed to protect small-molecule hormone antigens, enhancing the storage stability and thermal stability of the kit, thereby extending the shelf life of the kit.
Art no: PS21
Package size: 100mL, 1L, bulk
Appearance: transparency liquid
Usage amount: 0.5%~5%（V/V）
Storage: 2-8℃
Shelf life: 3 years
Application: Used for preparing dilutions of calibrators, standards, controls, or conjugates.
Instruction:
1. Protein protectant PS21 is a compound stabilizer for smallmolecule hormones and should be stored at 2~8℃. Allow it to be equilibrated to the reaction temperature before application..
2. Add Protein Protectant 21 at a ratio of 0.5%–5% (V/V) to the dilution buffer for small-molecule hormone antigen standards, calibrators, or controls. For a 0.5% addition, add 0.5 mL protectant to 100 mL dilution buffer.
Note: It is recommended to determine the optimal addition level for different small-molecule hormones through thermal-acceleration stability testing.
For research use only or for further use in the production of detection kits. Not for human or animal use!
Store at 2-8 °C.
For research use only or for further use in the production of detection kits. Not for human or animal use!
Q1: What is an antibody stabilizer used for?
A: It preserves antibody (and antigen) activity in liquid formulations and on solid surfaces, extending the shelf life of coated plates, conjugates and reagent mixes in IVD kits.
Q2: How do I choose between PBS, TRIS and protein-free versions?
A: Match the buffer system of your assay: PBS versions (ABPB, ABPF) for phosphate systems, TRIS versions (antibody-stabilizer-tris, ABTF) for amine-based systems, and protein-free versions when animal-protein content must be avoided.
Q3: What is PS21 Protein Protectant used for?
A: PS21 protects proteins during storage and processing, including applications around freeze-drying, where it helps maintain activity and structure of sensitive reagents.
Q4: Can the stabilizers be used for coated-plate storage?
A: Yes. They are designed for stabilizing coated antibodies/antigens on microplates and beads as well as in liquid conjugate stocks.
Q5: Can I replace my current antibody stabilizer with Protein protectant 21?
A: Usually yes. Protein protectant 21 preserves antibody and antigen activity in liquid formulations and on coated solid phases; replace your current stabilizer at the same volume fraction and validate with accelerated and real-time stability on your coated plates, beads or conjugates. PBS, TRIS and protein-free versions let you match your existing buffer system.
Committed to providing excellent ready-to-use reagent solutions to global advanced medical diagnostic companies.
Send RequestDurastab Medtech (Durastab IVD) is an IVD raw materials manufacturer based in Shenzhen, China, supplying ELISA and CLIA substrates, enzyme stabilizers, blocking buffers and reagent preservatives to in vitro diagnostic manufacturers worldwide.
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